🏗️ Added validation to db mixin

mixins/db.mixin.ts

@@ -2,21 +2,73 @@ const path = require("path");
 const mkdir = require("mkdirp").sync;
 const DbService = require("moleculer-db");
 
-
 export const DbMixin = (collection, model) => {
 	if (process.env.MONGO_URI) {
 		const MongooseAdapter = require("moleculer-db-adapter-mongoose");
+		console.log("Connecting to MongoDB at", process.env.MONGO_URI);
+
+		const connectWithRetry = (
+			adapter,
+			maxRetries = 5,
+			interval = 5000,
+			retries = 0
+		) => {
+			return adapter
+				.connect()
+				.then(() => console.log("MongoDB connected successfully!"))
+				.catch((err) => {
+					console.error("MongoDB connection error:", err);
+					if (retries < maxRetries) {
+						console.log(
+							`Retrying MongoDB connection in ${
+								interval / 1000
+							} seconds...`
+						);
+						setTimeout(
+							() =>
+								connectWithRetry(
+									adapter,
+									maxRetries,
+									interval,
+									retries + 1
+								),
+							interval
+						);
+					} else {
+						console.error(
+							"Failed to connect to MongoDB after several attempts."
+						);
+					}
+				});
+		};
+
+		const adapter = new MongooseAdapter(process.env.MONGO_URI, {
+			user: process.env.MONGO_INITDB_ROOT_USERNAME,
+			pass: process.env.MONGO_INITDB_ROOT_PASSWORD,
+			keepAlive: true,
+			useNewUrlParser: true,
+			useUnifiedTopology: true,
+		});
+
 		return {
 			mixins: [DbService],
-			adapter: new MongooseAdapter(process.env.MONGO_URI, {
-				user: process.env.MONGO_INITDB_ROOT_USERNAME,
-				pass: process.env.MONGO_INITDB_ROOT_PASSWORD,
-				keepAlive: true,
-				useUnifiedTopology: true,
-				family: 4,
-			}),
+			adapter: adapter,
 			model,
+			collection,
+			started() {
+				connectWithRetry(this.adapter);
+			},
+			stopped() {
+				this.adapter
+					.disconnect()
+					.then(() => console.log("MongoDB disconnected"))
+					.catch((err) =>
+						console.error("MongoDB disconnection error:", err)
+					);
+			},
 		};
+	} else {
+		console.log("MONGO_URI not provided, initializing local storage...");
+		mkdir(path.resolve("./data"));
 	}
-	mkdir(path.resolve("./data"));
 };